More than two dozen people were arrested in protests at California Walmart stores during the Black Friday shopping surge.

Police in Roseville arrested 15 people following a protest at a Walmart there, police said. The protesters were taken into custody for failing to disperse when they blocked an intersection in the Placer County city, police Sgt. Jeff Kool said.

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The protesters had marched about a half mile to the intersection following a demonstration that included about 100 people protesting Walmart's wages and labor practices.

It was one of many similar protests across the country Friday.

Amelia McLear, a spokeswoman for Wal-Mart Stores Inc., said the protesters were a "vocal minority."

"We're always willing to have a dialogue with our critics but it's hard to have a dialogue with people screaming into a megaphone," McLear said.

In Southern California, 10 people were arrested from among more than 100 members of a labor group and their supporters after they sat down in an Ontario intersection and waited to be taken away by police.

Karl Hilgert, of Claremont, who came dressed as Santa Claus, said he planned to be arrested for civil disobedience, and he and the others were later taken into custody as they sat in a circle in the roadway.

Several state legislators also joined the protest, where signs read "Livable Wages Over Greed."